Over several nights this past April, photographer and astronomy grad student Sean Goebel shot this time-lapse video of the night sky from the 14,000 ft summit of Mauna Kea in Hawaii, also the location of several of the world's top astronomical research observatories. As Goebel explains on his website, the lasers being emitted from the observatories are powerful (15-40 watt) instruments used to track and compensate for atmospheric turbulence. The foot-wide lasers are so strong that they can only be operated at specific times when no airplanes are flying nearby--the FAA actually calls a no-fly zone in the area when the lasers are flipped on. Find more of Goebel's great photos atop Mauna Kea here.